RS PRO Steel Shoulder Bolt M5 Thread 12mm Shoulder Length Hex Socket ISO 7379 Grade 12.9 399-161

RS PRO 399-161 is a steel shoulder bolt specifically designed for applications requiring precise alignment and high mechanical strength. Manufactured from high-grade 12.9 steel, this bolt provides superior tensile performance, making it ideal for demanding engineering, automotive, and manufacturing uses where durability and reliability are paramount.

The bolt features an M5 thread combined with a 12mm long cylindrical shoulder and a 6mm shoulder diameter. This geometry is engineered to enable accurate component position, reduce friction between moving parts, and permit rotational or sliding movement where required. The hex socket drive design promotes easy and secure installation, even in tight or limited-access areas, making assembly efficient and robust.

This RS PRO shoulder bolt meets ISO 7379 standards, ensuring consistent manufacturing quality and compatibility with a range of industrial setups and assemblies. With a plain finish, the steel surface offers resilience against wear, and a professional appearance suited for environments from automated machinery to custom tooling fixtures.

The robust construction makes the 399-161 suitable for repetitive assembly and disassembly, delivering consistent alignment and reliable performance over long periods. Professionals in machine building, vehicle assembly, production automation, and heavy-duty maintenance rely on such fasteners for their critical role in ensuring smooth motion and precise location of machine components.

Typical applications include use as guide pins, pivot points, and in fixtures or mechanisms where a combination of axial holding and rotational freedom is required. The size and ISO conformity make it compatible with widely used industrial and machine standards. Whether used in a new design or as a replacement, this shoulder bolt enhances assembly quality and system longevity.

The RS PRO 399-161 shoulder bolt is a versatile, reliable fastener that addresses the specialist requirements of modern mechanical, automotive, and industrial assemblies. Its features and specifications make it a trusted choice for engineers seeking performance, durability, and precision.

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